Cdr
abbr. 指挥员（Commander）；会长（commander）；交货收据（Cargo Delivery Receipt）
📖 牛津释义
Cdr
(also Cmdr), abbr 缩写 = Commander
Cdr (John) Stone （约翰）斯通指挥官.
🗣️ 情景例句
We have to maintain communication to understand each other.
必须保持交流以求相互理解。
My mother mailed me a parcel.
我妈给我寄了一个包裹。
If we could actually see the path described by a particle,such as a sand grain in the rock,
假如我们真能看到的运动轨迹，诸如岩石中一个沙粒分子